KR20120077451A - Three dimension image display device - Google Patents

Abstract

PURPOSE: A 3D image display device is provided to eliminate noise due to an operation of a portrait picture of a non-glass type 3D image display device. CONSTITUTION: A 3D switch panel(200) operates a liquid crystal layer by a lower barrier layer and an upper barrier layer. The 3D switch panel spatially divides color light of a right eye image and a left eye image which is incident from a display panel. A touch screen(300) detects a touch location of a user. A shield electrode(270) eliminates noise on an upper substrate by operating a landscape picture and a portrait picture of the display panel.

Description

3D image display device {THREE DIMENSION IMAGE DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display device, and more particularly, to a glasses-free three-dimensional image display device capable of improving touch sensing performance by removing noise caused by driving a landscape screen and a portrait screen. will be.

Recently, users' demand for realistic images has increased, and 3D image display apparatuses capable of displaying not only 2D (2D) images but also 3D (3D) images have been developed and commercialized.

Conventional flat panel displays have made great progress in terms of display image quality, such as resolution and viewing angle, but since they can express information only on a two-dimensional plane, that is, the display surface, the fundamental limitation of losing all the depth information of the object to be expressed Have

On the other hand, since the three-dimensional image display device can display the object in three dimensions in a three-dimensional space rather than a two-dimensional plane, it is possible to express more realistic and realistic information than the conventional two-dimensional display.

The 3D image display apparatus can be largely classified into a three-dimensional glasses method using three-dimensional special glasses and a glassesless type not using a three-dimensional special glasses.

Shutter glass (SG) and patterned retarder (SG) methods have been developed for the use of three-dimensional special glasses.

Referring to FIG. 1, the shutter glass method sequentially displays a left eye image and a right eye image according to time, and selectively transmits a left eye image and a right eye image sequentially displayed through three-dimensional special glasses to implement a 3D image. do.

Referring to FIG. 2, the polarization delay method spatially divides a display area of a liquid crystal panel to display a left eye image and a right eye image, and selectively transmits a left eye image and a right eye image through linear polarizing film glasses or circular polarizing film glasses. Implement 3D video.

The glasses-free 3D display device is the same as the glasses method described above in terms of giving a user a three-dimensional effect by using binocular parallax, but is differentiated in that there is no need to wear special glasses.

In order to allow viewers to watch 3D images by separating the left eye image and the right eye image without wearing special glasses for 3D, the glasses-free three-dimensional image display device has a method of projecting different images at different positions in a space. I use it. When the viewer is in the correct position, different images are projected to the viewer's left and right eyes to feel a three-dimensional effect due to binocular disparity.

As such, a special optical device is attached in front of the display panel in order to project different images in different directions, and the most used ones are the switchable barrier method and the lenticular lens method.

Dual switchable barrier-type 3D image display apparatus includes a display panel that displays an image including a plurality of R, G, and B pixels, and a 3D switch panel that realizes a 3D image by switching light incident from the display panel. It includes.

In this case, an organic light emitting diode (OLED) display apparatus generates an R, G, and G color light by using an organic light emitting diode (OLED), and displays an image. The 3D switch panel includes a lower substrate and an upper substrate bonded to each other between the liquid crystal layers as in a general liquid crystal panel, and the lower substrate and the upper substrate are formed with vertical and horizontal barriers to drive the liquid crystal layer. .

Recently, a touch screen that allows a user to directly input information on a screen using a finger or a pen, replacing a conventional input device such as a mouse or a keyboard as an input device of a flat panel display device, is an input device of a display device. Is being applied. Since the touch screen has an advantage that anyone can easily operate, the application has been expanded to an input device of a mobile phone or a smartphone.

The glasses-free 3D display device is being applied to not only PC monitors and TVs but also mobile devices such as mobile phones and smartphones, and has an on-cell type touch on top of the glassesless 3D display device. Development is in progress toward placing the screen.

3 and 4 are diagrams illustrating a problem in that touch sensing performance is deteriorated due to a pivot change of the glassesless 3D image display device according to the related art. 3 and 4 illustrate the barrier 10 in the vertical direction formed on the lower substrate among the barriers formed on the lower substrate and the upper substrate of the 3D switch panel.

Referring to FIGS. 3 and 4, an eyeglass-free three-dimensional image display device is considered to be applied to a small mobile device such as a mobile phone or a smart phone, and the mobile device moves the pivot of the screen vertically according to a user's operation. Or, the demand for driving in a horizontal direction and a landscape screen and a portrait screen is expanding.

When a three-dimensional image is displayed on a landscape screen and then turned to a portrait screen, a barrier changes from the form shown in FIG. 3 to the form shown in FIG. 4.

As such, in order to smoothly realize a 3D image when driving a landscape screen and a portrait screen, an electrode should be formed on the upper substrate as well as the lower substrate of the 3D switch panel.

When driving to a landscape screen, the driving voltage supplied to the lower electrode formed on the lower substrate of the 3D switch panel is swinged, and the common voltage Vcom is supplied to the upper electrode formed on the upper substrate. The image will be implemented.

On the other hand, when driving to a portrait screen, the common voltage Vcom is supplied to the lower electrode of the 3D switch panel, and the driving voltage supplied to the upper electrode is swinged to implement the 3D image.

Therefore, when driving to a portrait screen, noise is generated on the back of the upper substrate of the 3D switch panel due to the swing of the driving voltage of the upper electrode. As such, when noise is formed on the rear surface of the upper substrate when driving to the portrait screen, there is a problem in that the touch sensing performance is deteriorated when the touch position of the user is detected through the touch screen.

In particular, small mobile devices such as mobile phones and smart phones, as well as communication and display functions, touch sensing performance is recognized as an important factor for the consumer to select a mobile device. Therefore, if touch sensing performance is degraded due to noise caused by the portrait screen, the use of a mobile device may be impaired, and the touch sensing performance may also affect a consumer's purchase of a product.

An object of the present invention is to provide a three-dimensional image display device capable of removing noise caused by driving a portrait screen of an asteriskless three-dimensional image display device.

Disclosure of Invention The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a glasses-free three-dimensional image display device capable of improving touch sensing performance.

Disclosure of Invention The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a three-dimensional non-glass 3D image display device capable of preventing a malfunction of a mobile device due to noise caused by driving a portrait screen.

Other features and advantages of the invention will be set forth in the description which follows, or may be obvious to those skilled in the art from the description and the claims.

According to an embodiment of the present invention, a three-dimensional image display device includes: a display panel configured to generate a color light of a left eye image and a color light of a right eye image by driving a plurality of pixels to generate R, G, and B color light; A 3D switch panel for driving the liquid crystal layer through the lower barrier layer formed on the lower substrate and the upper barrier layer formed on the upper substrate to spatially divide the color light of the left eye image and the color light of the right eye image incident from the display panel; A touch screen for detecting a touch position of a user; And a shield electrode configured to remove noise formed on the upper substrate by driving a landscape screen and a portrait screen of the display panel.

The 3D image display device according to an exemplary embodiment of the present invention may further include a voltage supply unit for supplying a DC voltage to the shield electrode or a system ground for grounding the shield electrode.

The touch screen of the 3D image display device according to an exemplary embodiment of the present invention may be disposed on the 3D switch panel, and the shield electrode may be formed on the rear surface of the upper substrate of the 3D switch panel.

3D image display device according to an embodiment of the present invention is characterized in that the upper barrier layer is formed on the back of the touch electrode.

In the lower barrier layer and the upper barrier layer of the 3D image display device according to an exemplary embodiment of the present invention, a plurality of layer electrodes to which a driving voltage for driving the liquid crystal layer is applied are formed in a multilayer structure.

The glassesless 3D image display device according to an exemplary embodiment of the present invention can remove noise caused by driving a portrait screen.

The glassesless 3D image display device according to an exemplary embodiment of the present invention may improve the touch sensing performance of the touch screen.

The glassesless 3D image display device according to an exemplary embodiment of the present invention can prevent a malfunction of a mobile device due to noise caused by driving a portrait screen.

Other features and effects of the present invention may be newly understood through the embodiments of the present invention in addition to the features and effects of the present invention mentioned above.

1 is a view showing a three-dimensional image display device using a shutter glass method and a driving method thereof.
2 is a view showing a three-dimensional image display device using a polarization delay method and a driving method thereof.
3 and 4 are diagrams illustrating a problem in that touch sensing performance is reduced due to a pivot change of the glassesless 3D image display device according to the related art.
5 to 7 are views illustrating a glassesless three-dimensional image display device according to an embodiment of the present invention.
8 and 9 are diagrams illustrating a method of driving an agglomeration glassesless 3D image display device according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described with respect to the glasses-free three-dimensional image display device and a driving method thereof according to an embodiment of the present invention.

5 to 7 are diagrams illustrating a glasses-free three-dimensional image display device according to an exemplary embodiment of the present invention.

Prior to the description with reference to the drawings, when the 3D image is implemented, the present invention eliminates noise generated due to a change in driving from a landscape screen to a portrait screen to improve touch sensing performance. It relates to a spectacle three-dimensional image display device and a driving method thereof, and a detailed description of the matters not directly related thereto will be omitted.

The first driving circuit unit (not shown) for driving the display panel 100 may include a timing controller, a scan driver, a data driver, a driving power supply VDD, and a power supply supplying a reference power supply Vref. Since the same configuration as that of the driving circuit of the organic light emitting diode display is included, a detailed description thereof will be omitted.

The second driving circuit unit (not shown) for driving the 3D switch panel 200 may include a timing controller (D-IC), a data driver (D-IC), a gate driver (G-IC), and a power supply unit. Since the same configuration as that of the driving circuit of the general liquid crystal display is included, a detailed description thereof will be omitted.

5 to 7, the spectacle-free three-dimensional image display device according to an embodiment of the present invention includes a display panel 100; 3D switch panel 200; Touch screen 140; A first driving circuit unit (not shown) for driving the display panel 100; And a second driving circuit unit (not shown) for driving the 3D switch panel 200.

The display panel 100 may include a lower substrate 110 on which a plurality of pixels 120 are formed; An upper substrate 130 encapsulating the plurality of pixels 120; The first polarizer 140 is disposed on the upper substrate 130 to polarize light from the plurality of pixels 120.

Here, each of the plurality of pixels 120 includes a plurality of OLEDs (Organic Light Emitting Diodes) for generating color light of R, G, and B, a plurality of switch TFTs, a drive TFT, and a capacitor (Cst) for driving the OLEDs. Include.

A plurality of OLEDs generating R, G, and B color light are driven by driving a plurality of switch TFTs and drive TFTs formed in each of the plurality of pixels 120 and charging a voltage of a capacitor Cst to display a color image. . In this case, the 3D image data is input to the display panel 100, and the color light for displaying the left eye image L and the color light for displaying the right eye image R according to the input 3D image data may include a plurality of pixels ( 120 is displayed sympathically.

The first polarizer 140 polarizes color light of R, G, and B generated by each pixel 120 of the display panel 100 and emits the light to the 3D switch panel 200.

The adhesive layer 150 bonds the display panel 100 to the 3D switch panel 200.

The 3D switch panel 200 includes a lower substrate 210 and an upper substrate 230 bonded together with the liquid crystal layer 250 therebetween.

The lower substrate 210 is formed of a transparent glass material, and a lower barrier layer 220 for separating the image displayed on the display panel 100 into a left eye and a right eye image is formed thereon.

As illustrated in FIG. 6, the lower barrier layer 220 may include a plurality of first barrier electrodes 222 and a plurality of second barrier electrodes 226 for driving the liquid crystal layer 250 using an applied voltage. Include. An insulating layer 224 for passivation is formed between the plurality of first barrier electrodes 222 and the plurality of second barrier electrodes 226.

Here, the plurality of first barrier electrodes 222 and the plurality of second barrier electrodes 226 are formed of a transparent conductive material such as indium tin oxide (ITO), and have a slit form as shown in FIG. 5. It can be formed vertically.

The first barrier electrode 222 is formed by depositing a transparent conductive material such as ITO on the lower substrate 210 and then patterning the pattern. Thereafter, an insulating layer 224 is formed to cover the first barrier electrode 222 for passivation. Thereafter, ITO is deposited on the insulating layer 224, and then patterned to form the second barrier electrode 226.

As such, forming the first barrier electrode 222 and the second barrier electrode 226 in a plurality of layers on the lower barrier layer 220 reduces the transmission of the color light supplied from each pixel 120 of the display panel 100. This is to realize the 3D image by adjusting it.

Subsequently, the upper substrate 230 is formed of a transparent glass material, and an upper barrier layer 240 is formed on the bowel to separate the image displayed on the display panel 100 into a left eye and a right eye image.

As illustrated in FIG. 6, the upper barrier layer 240 may include a plurality of third barrier electrodes 242 and a plurality of fourth barrier electrodes 246 for driving the liquid crystal layer 250 using an applied voltage. Include. An insulating layer 244 for passivation is formed between the plurality of third barrier electrodes 242 and the plurality of fourth barrier electrodes 246.

Here, the plurality of third barrier electrodes 242 and the plurality of fourth barrier electrodes 246 are formed of a transparent conductive material such as ITO, and are horizontally formed in the form of slits as shown in FIG. 5. Can be.

After depositing ITO on the back surface of the upper substrate 230, the third barrier electrode 242 is formed by patterning the ITO. Thereafter, an insulating layer 244 is formed to cover the third barrier electrode 242 for passivation. Thereafter, ITO is deposited on the insulating layer 244, and then patterned to form a fourth barrier electrode 246.

As described above, forming the third barrier electrode 242 and the fourth barrier electrode 246 on the upper barrier layer 240 in a plurality of layers is the same as that of the lower barrier layer 220 described above. This is to realize a 3D image by finely controlling the transmission of color light supplied from the pixel 120.

In order to control the behavior of the liquid crystal layer 250, the driving voltages supplied to the lower barrier layer 220 and the upper barrier layer 240 may be supplied with a common voltage Vcom and a swing voltage.

For example, as the display panel 100 is driven to a landscape screen and a portrait screen, driving voltages supplied to the lower barrier layer 220 and the upper barrier layer 240 may vary. Detailed description thereof will be described later with reference to FIGS. 8 and 9.

A shield electrode 270 is formed on the rear surface of the upper substrate 230 to remove noise formed on the upper substrate 230 due to the landscape screen and the portrait screen driving of the display panel 100. do.

Here, the shield electrode 270 is formed closest to the rear surface of the upper substrate 230, an insulating layer (not shown) is formed on the shield electrode 270, the upper barrier layer 240 is formed on the insulating layer Will be formed.

The shield electrode 270 may be supplied with a DC voltage as shown in FIG. 7. Alternatively, the shield electrode 270 may be connected to the ground GND. The shield electrode 270 removes noise formed on the rear surface of the upper substrate 230.

The shield electrode 270 may remove not only noise caused by driving the landscape screen and the portrait screen of the display panel 100, but also noise caused by driving the 3D switch panel 200 itself. . That is, the shield electrode 270 may serve as an electrostatic discharge (ESD) electrode that removes noise and static electricity formed in the 3D switch panel 200.

The 3D image display device according to the present invention includes a DC voltage supply unit (not shown) or a shield electrode for supplying a DC voltage or a ground (GND) voltage to the shield electrode 270 to remove noise formed on the upper substrate 230. 270 may include a system ground (not shown) for grounding.

The second polarizing plate 260 for polarizing the light emitted through the 3D switch panel 200 is disposed on the upper substrate 230.

The 3D switch panel 200 including the above-described configuration drives the liquid crystal layer 250 using the lower barrier layer 220 formed on the lower substrate 210 and the upper barrier layer 240 formed on the upper substrate 230. Let's do it.

By finely adjusting the transmittance of the color light incident on the plurality of pixels 120 of the display panel 100, the left eye image and the right eye image displayed on the plurality of pixels 120 are spatially divided and transmitted. As a result, the left eye image and the right eye image displayed on the different pixels 120 of the display panel 100 are separately recognized by the viewer's left and right eyes, thereby allowing the viewer to recognize the 3D image.

The glassesless 3D image display device according to an exemplary embodiment of the present invention may be applied to a small mobile device such as a mobile phone or a smart phone. As shown in FIGS. 5 and 7, the transparent glass substrate 310 is provided as an input means. In addition, the touch screen 300 including the touch electrode 320 for recognizing a user's touch may be disposed on the 3D switch panel 200 in an on-cell type.

Referring to FIGS. 8 and 9, a non-eyeglass type 3D image display device according to an exemplary embodiment of the present invention may include a landscape screen by rotating a pivot of a screen in a vertical direction or a horizontal direction according to a user's manipulation. It can be driven by the portrait screen.

Here, when displaying a 3D image on a landscape screen and turning to a portrait screen, the barrier caused by the 3D switch panel 200 changes as shown in FIG. 8.

As described above, the lower barrier layer 220 is formed on the lower substrate 210 of the 3D switch panel 200 to smoothly realize a 3D image when driving a landscape screen and a portrait screen. The upper barrier layer 240 is formed on the upper substrate 230.

When driving to a landscape screen, as shown in FIG. 9, a common voltage Vcom is supplied to the upper barrier layer 240 formed on the upper substrate 230 of the 3D switch panel 200 as a driving voltage. The lower barrier layer 220 formed on the lower substrate 210 may swing and supply a driving voltage to implement a 3D image.

For example, a voltage of 0 V may be supplied to the first barrier electrode 222 of the lower barrier layer 220 and a voltage of 10 V may be supplied to the second barrier electrode 226 to swing the driving voltage. .

Meanwhile, when driving to a portrait screen, a common voltage Vcom is supplied as a driving voltage to the lower barrier layer 220 formed on the lower substrate 210 of the 3D switch panel 200, and the upper substrate 230 is operated. The 3D image may be implemented by supplying a driving voltage to the upper barrier layer 240 formed at the swing barrier.

For example, a voltage of 0 V may be supplied to the third barrier electrode 242 of the upper barrier layer 240 and a voltage of 10 V may be supplied to the fourth barrier electrode 246 to swing the driving voltage. .

As such, when driving to the portrait screen, noise may be generated on the rear surface of the upper substrate 230 due to the swing of the driving voltage supplied to the upper barrier layer 240 of the upper substrate 230. Is removed by the DC voltage or the ground GND supplied to the shield electrode 270 described above.

Therefore, in detecting the touch position of the user through the touch screen 300 disposed on the upper substrate 230, it is possible to prevent the touch sensing performance from being degraded due to noise caused by driving to the portrait screen. have.

When the glasses-free 3D image display device according to an exemplary embodiment of the present invention is applied to a small mobile device such as a mobile phone or a smart phone, the touch sensing performance of the touch screen when the landscape screen and the portrait screen are driven Can be kept constant, thereby preventing the use of mobile devices.

In addition, the glasses-free three-dimensional image display device according to an embodiment of the present invention can have a positive effect on the consumer's product purchase by maintaining a constant touch sensing performance of the touch screen irrespective of the pivot of the three-dimensional image. have.

In the above description, the touch screen 300 has been described as being disposed on the 3D switch panel 200 in an on-cell type, but this has described an embodiment of the present invention.

In another embodiment of the present invention, the touch screen 300 may be implemented in the inside of the 3D switch panel 200 in an in-cell type. In this case, the touch screen 300 may be located at a location where the touch screen 300 is implemented. Accordingly, the position where the shield electrode 270 is formed may also be changed.

In the above description, the display panel has been described as being an OLED panel including an OLED element, but this shows one embodiment of the present invention. In another embodiment of the present invention, the display panel may also be applied to other flat panel display panels other than the OLED panel.

In the above description, it has been described that the 3D image is realized by arranging the 3D switch panel on the display panel, which is illustrated in one embodiment of the present invention. As another example of the present invention, a lenticular lens may be disposed on the display panel to implement a 3D image.

It will be understood by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: display panel 110: lower substrate
120: pixel 130: upper substrate
140: first polarizing plate 150: adhesive layer
200: 3D switch panel 210: lower substrate
220: lower barrier layer 222: first barrier electrode
224 and 242 insulating layer 226 second barrier electrode
230: upper substrate 240: upper barrier layer
242: third barrier electrode 246: fourth barrier electrode
250: liquid crystal layer 260: second polarizing plate
270: shield electrode 300: touch screen
310: glass substrate 320: touch electrode

Claims (9)

A display panel for driving a plurality of pixels generating R, G, and B color light to generate color light of a left eye image and color light of a right eye image;
A 3D switch panel for driving the liquid crystal layer through the lower barrier layer formed on the lower substrate and the upper barrier layer formed on the upper substrate to spatially divide the color light of the left eye image and the color light of the right eye image incident from the display panel;
A touch screen for detecting a touch position of a user; And
And a shield electrode configured to remove noise formed on the upper substrate by driving a landscape screen and a portrait screen of the display panel. 2. The method of claim 1,
And a voltage supply unit for supplying a DC voltage to the shield electrode or a system ground for grounding the shield electrode. The method of claim 1,
The touch screen is disposed above the 3D switch panel,
And the shield electrode is formed on a rear surface of an upper substrate of the 3D switch panel. The method of claim 1,
And an upper barrier layer formed on a rear surface of the touch electrode. The method of claim 1,
The lower barrier layer and the upper barrier layer,
And a plurality of layer electrodes to which a driving voltage for driving the liquid crystal layer is applied are formed in a multilayer structure. The method of claim 1,
The driving voltage of the upper barrier layer is supplied with a common voltage, and the driving voltage of the lower barrier layer is supplied with a swing when driving to the landscape screen. The method of claim 1,
The driving voltage of the lower barrier layer is supplied with a common voltage, and the driving voltage of the upper barrier layer is supplied with a swing when driving to the portlet screen. The method according to claim 6 or 7,
The lower barrier layer is
A plurality of first barrier electrodes formed of a transparent conductive material on the lower substrate;
An insulating layer formed to cover the plurality of first barrier electrodes;
And a plurality of second barrier electrodes formed of a transparent conductive material on the insulating layer. The method according to claim 6 or 7,
The upper barrier layer is
A plurality of third barrier electrodes formed of a transparent conductive material on the upper substrate;
An insulating layer formed to cover the plurality of third barrier electrodes;
And a plurality of fourth barrier electrodes formed of a transparent conductive material on the insulating layer.

Images