KR101981581B1 - Display device using polarized glasses and method of driving the same - Google Patents

Abstract

The present invention relates to a polarizing glasses type display device driven in a normal mode, a 3D mode and a security mode, comprising: a pixel arranged in a matrix form along a row line and a column line, the pixel including a main pixel and a sub- A display panel including the display panel; And a pattern drifter which is disposed on the display surface of the display panel and generates alternating circularly polarized light alternately arranged in units of the row lines, wherein in the secure mode driving, among the odd-numbered and even- One of the odd-numbered and even-numbered row lines displays an obstructive image inhibiting the reading of the input image, and the main pixel and the sub-pixel of the row line displaying the input image display the input And odd-numbered and even-numbered row line data of the image are inputted to the polarizing glasses system display apparatus.

Description

[0001] The present invention relates to a polarizing glasses type display device and a method of driving the same,

The present invention relates to a display apparatus, and more particularly, to a polarizing glasses type display apparatus and a driving method thereof.

As the information society has developed in recent years, the demand for the display field has been increasing in various forms, and a display device capable of realizing not only a two-dimensional plane image but also a three-dimensional stereoscopic image with respect to an image realization method has been developed.

In addition to the binocular disparity due to the distance between the two eyes, there are psychological and memorizing factors for the depth and stereoscopic effect of the human image.

One of the three-dimensional stereoscopic image display methods using these factors is a stereoscopic type in which stereoscopic effect is felt using physiological factors of both eyes.

The stereoscopic type is the ability to generate the spatial information before and after the display surface in the process of fusion of the brain by providing the plane image of the plane including the parallax information in the left and right, That is, stereography is used.

Such a stereoscopic expression system is classified into a spectacle system in which a viewer wears special glasses depending on a substantial stereoscopic generation position and a non-stereoscopic vision system in which a lens array such as a parallax barrier or a lenticular on the display side is used, . ≪ / RTI >

Among these glasses, the viewing angle is wider than that of the non-glasses type, and it is less prone to dizziness and can be manufactured at a relatively low cost.

The above-described spectacle method can be divided into a shutter spectacle method and a polarizing spectacle method.

The shutter glasses system alternately displays the left and right eye images on one screen and synchronizes the sequential opening and closing timings of the left and right shutters of the shutter glasses with the temporal difference times of the left and right eyes so that the respective images are separately recognized in the left eye and the right eye It is a method of expressing three-dimensional feeling.

Flicker phenomenon may occur when the shutter eyeglasses system is not controlled so as to perfectly match the temporal difference timings so that observers may experience fatigue such as dizziness when viewing stereoscopic images.

On the other hand, in the polarizing glasses system, the pixels of one screen are divided into two in units of row lines so that the left and right eye images are displayed in different polarization directions, and the left and right eye lenses of the polarizing glasses have different polarization directions, This is a way to express stereoscopic feeling by being recognized separately in the left eye and the right eye.

In this regard, for example, in the display device, a left-eye image of left-handed circularly polarized light and a right-eye image of right-handed circularly polarized light are emitted, and circularly polarized light corresponding to each of the left eye lens and right eye lens of the polarizing glasses is converted into linearly polarized light.

On the other hand, it is possible to implement a security mode in which a surrounding person can not recognize an image viewed by a user by utilizing the polarizing glasses type display device as described above.

In this regard, in the security mode driving, both the left eye lens and the right eye lens use the security polarizing glasses having the same polarization direction, for example, having the left-handed polarization direction. The display device outputs a user image to be viewed by the user on the odd-numbered row line, and an obstructive image which inhibits the readability of the user image on the even-numbered row line, for example. At this time, the user image is output as left circularly polarized light, and the disturbance image is outputted as right circularly polarized light.

In such a case, the security polarized glasses intercept the disturbance image and transmit only the user image, so that the user can view the desired image. On the other hand, since the surrounding people who do not wear the security polarizing glasses see the user image and the disturbed image together, the readability of the user image is degraded, and the user image can not be correctly recognized. As a result, the above-described method can secure security.

However, in the above-described method, the row line portion corresponding to the disturbance image during the security mode operation is not recognized by the user. Therefore, the user sees the user image composed of half of the original image, which causes a problem that the recognition resolution is lowered.

A problem to be solved is to provide a method for improving the resolution degradation in the security mode driving in the stereoscopic display apparatus.

According to an aspect of the present invention, there is provided a polarizing glasses type display device driven in a normal mode, a 3D mode, and a security mode, the polarizing type glasses device being disposed in matrix form along a row line and a column line, A display panel including pixels constituted by the main pixel and the sub-pixel; And a pattern drifter which is disposed on the display surface of the display panel and generates alternating circularly polarized light alternately arranged in units of the row lines, wherein in the secure mode driving, among the odd-numbered and even- One of the odd-numbered and even-numbered row lines displays an obstructive image inhibiting the reading of the input image, and the main pixel and the sub-pixel of the row line displaying the input image display the input And odd-numbered and even-numbered row line data of the image are inputted to the polarizing glasses system display apparatus.

In the 3D mode driving, a corresponding one of the left eye image data and the right eye image data is input to the main pixel, and black data may be input to the sub pixel.

In the normal mode driving, the input image data may be input to the main pixel, and the same data as the main pixel or the interpolation data of the input image data may be input to the sub-pixel.

And a data processor for generating data to be input to the main pixel and the sub-pixel according to the driving mode.

The main pixel and the sub-pixel may be connected to the same data line and connected to neighboring gate lines, respectively.

According to another aspect of the present invention, there is provided a liquid crystal display comprising: a display panel arranged in a matrix form along a row line and a column line, the display panel including a pixel constituted by a main pixel and a subpixel along the row direction; And a pattern drifter disposed alternately in units of the row lines and generating circular polarized light opposite to each other, wherein the pattern drifter is driven in a normal mode, a 3D mode, and a secure mode, One of the odd-numbered and even-numbered row lines displays an input image, the other of the odd-numbered and even-numbered row lines displays an obstructive image inhibiting the reading of the input image, And the other one of the odd-numbered and even-numbered row line data of the input image is input to the main pixel and the sub- It provides a method of driving the market value.

In the 3D mode driving, a corresponding one of the left eye image data and the right eye image data is input to the main pixel, and black data may be input to the sub pixel.

In the normal mode driving, the input image data may be input to the main pixel, and the same data as the main pixel or the interpolation data of the input image data may be input to the sub-pixel.

The polarizing glasses type display device may include a data processing unit for generating data to be input to the main pixel and the sub-pixel according to the driving mode.

The main pixel and the sub-pixel may be connected to the same data line and connected to neighboring gate lines, respectively.

In the present invention, a pixel constitutes a main pixel and a sub-pixel. In this case, when the security mode is activated, the resolution of the original image can be maintained by inputting the original image data to the main pixel and the sub-pixel of the pixel of the row line that generates the original image.

Further, when the black data is input to the sub-pixel in the 3D mode driving, the effect of improving the viewing angle can be exhibited.

When the interpolation data is input to the sub-pixel in the 2D mode driving, the effect of increasing the resolution in the vertical direction can be exhibited.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a block diagram schematically showing a configuration of a polarizing glasses type stereoscopic display apparatus according to an embodiment of the present invention; FIG.
2 is a perspective view schematically showing a polarizing glasses stereoscopic display device and a polarizing glasses according to an embodiment of the present invention.
3 is a circuit diagram schematically showing a pixel structure of a display panel according to an embodiment of the present invention.
4 is a view for explaining image data input to a main pixel and a sub-pixel according to a driving mode in a display apparatus according to an embodiment of the present invention;
5 and 6 are graphs showing simulation results in the security mode according to the conventional and the embodiments of the present invention, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram schematically showing a configuration of a polarizing glasses-based stereoscopic displaying apparatus according to an embodiment of the present invention. FIG. 2 schematically shows a polarizing glasses stereoscopic displaying apparatus and polarizing glasses according to an embodiment of the present invention. And FIG. 3 is a circuit diagram schematically showing a pixel structure of a display panel according to an embodiment of the present invention.

1 to 3, a display device 100 according to an embodiment of the present invention may include a display panel 110 and a driving circuit unit.

The display panel 200 generates a corresponding image according to the driving mode. For example, in a normal mode operation, a 2D image, that is, a plane image, is generated. In addition, the 3D mode operation generates a 3D image, that is, a stereoscopic image. In security mode, security video is generated. A detailed description thereof will be described later.

As the display panel 110, various types of flat panel display panels can be used. For example, a liquid crystal display panel, a field emission display panel, a plasma display panel, an inorganic electroluminescent panel, and an organic light emitting diode panel, An electroluminescent display panel, an electrophoresis display panel, and the like, may be used.

In the embodiment of the present invention, for convenience of explanation, a case where the liquid crystal display panel is used as the display panel 110 will be described as an example. As described above, when a liquid crystal display panel is used, a backlight unit may further be formed on the back surface of the display panel 110, though not specifically shown.

The driving circuit unit for driving the display panel 110 may include a data driving circuit 120, a gate driving circuit 130, and a timing control circuit 140.

The timing control circuit 140 receives a vertical / horizontal synchronizing signal, a data enable signal, a dot clock signal, and the like from an external host system through an interface such as a Low Voltage Differential Signaling (LVDS) interface or a Transition Minimized Differential Signaling And the like.

Using such a timing signal, the timing control circuit 140 can generate a data control signal for controlling the data driving circuit 120 and a gate control signal for controlling the gate driving circuit 130.

Meanwhile, the timing control circuit 140 receives the image data D from the external system, processes the image data D, and supplies the image data D to the data driving circuit 120.

The timing control circuit 140 processes the image data D input in accordance with the drive mode and outputs data for outputting two first and second image data D1 and D2 corresponding to each pixel P The processing unit 141 may be configured.

In this regard, each pixel P includes a main pixel P1 and a sub-pixel P2. Accordingly, the data processing unit 141 generates first and second image data D1 and D2, which are input to the main pixel and the sub-pixels P1 and P2, respectively, for each pixel P. [

At this time, output values of the first and second image data D1 and D2 are determined according to the driving mode, and a detailed description thereof will be described later.

The data driving circuit 120 may be composed of a plurality of driving ICs, for example. Such a driving IC may be connected to the display panel 110 by a COG (Chip On Glass) method or a COF (Chip On Film) method and connected to a corresponding data line DL.

The data driving circuit 120 receives the digital image data D1 and D2 output from the timing control circuit 140 and the data control signal and outputs the analog image data or data voltage to the corresponding data line DL .

The gate driving circuit 130 may be composed of a plurality of driving ICs, for example. Such a driving IC may be connected to the display panel 110 by a COG (Chip On Glass) method or a COF (Chip On Film) method, and may be connected to a corresponding gate line DL.

As another example, the gate drive circuit 130 may be formed in a non-display area of the array substrate when the array substrate of the display panel 110 is manufactured in a GIP (gate in panel) manner. In this regard, in the process of forming the array elements such as transistors in the display region of the array substrate of the display panel 110, the gate drive circuit 130 can be formed in the non-display region.

The gate driving circuit 130 supplies the gate signal to the gate wiring GL in accordance with a gate control signal supplied directly from the timing control circuit 140 or supplied through the data driving circuit 120.

In the display panel 110, a plurality of pixels P are arranged in a matrix form along the row lines and the row direction to generate an image.

The display panel 110 generates a plane image when driven in the normal mode. That is, in the normal mode driving, all the pixels P of the display panel 110 function as one unit constituting the plane image.

Thus, when operating in the normal mode, the user does not need to wear polarized glasses.

On the other hand, when driving in the 3D mode, the display panel 110 generates the left eye image Il and the right eye image Ir. In this regard, for example, one of the odd-numbered row line and the even-numbered row line generates the left eye image Il and the other generates the right eye image Ir. In the embodiment of the present invention, for convenience of explanation, the pixel P of the odd row line generates the left eye image Il, and the pixel P of the even row line generates the right eye image Ir For example.

The display panel 110 displays a user image Iu which can be recognized only by the user and an interference image Ii which inhibits the reading of the user image Iu . In this regard, for example, one of the odd-numbered row line and the even-numbered row line generates the user image Iu and the other generates the disturbing image Ii. In the embodiment of the present invention, for convenience of explanation, the pixel P of the odd-numbered row line generates the user image Iu and the pixel P of the even-numbered row line generates the disturbed image Ii For example.

On the other hand, in the case where the display panel 110 is a color display panel for displaying color, for example, R, G, and B which output light of R (red), G (green) B pixels can be arranged.

The polarizing plate 310 and the patterned layer 320 may be formed on the front side of the display panel 110, that is, on the display surface.

The polarizing plate 310 functions to convert the light emitted from the display panel 110 into linearly polarized light.

The pattern drifter 320 functions to convert linearly polarized light emitted through the polarizing plate 310 into circularly polarized light. Such a pattern drifter 320 includes first and second pattern drifters 321 and 322 that emit circularly polarized light opposite to each other in correspondence with the odd and even row lines of the display panel 110 . In the embodiment of the present invention, for convenience of explanation, the first pattern driver 321 for converting the left circularly polarized light into the odd-numbered row lines is disposed, and the second pattern writer 321 for converting the right- A case where the pattern drifter 322 is disposed will be described as an example.

In this case, in the 3D mode driving, the left eye image generated in the odd-numbered row line has left-hand circular polarization by the first pattern drifter 321, the right eye image generated in the even- And has a right circularly polarized light by the tderer 322.

For example, the 3D polarized glasses 400 include a left eye lens 410 for converting left-handed circularly polarized light into linearly polarized light, and a left-eye lens 410 for converting right- The right eye lens 420 is used. Accordingly, the left eye image is transmitted through the left eye lens 410 to be input to the left eye, the right eye image is transmitted through the right eye lens 420, and the right eye image is input to the right eye, thereby enabling the user to recognize the stereoscopic image.

On the other hand, when the security mode is activated, the user image Iu generated in the odd-numbered row line is left-polarized by the first pattern retarder 321, and the disturbance image generated in the even- And has a right circularly polarized light by the tderer 322.

For example, the security polarizing glasses 500 use a left eye lens and a right eye lens 510, 520 for converting left-handed circularly polarized light into linearly polarized light. do. Accordingly, the user image is transmitted through the left eye lens and the right eye lenses 510 and 520 and is input to the left eye and the right eye, so that the user can recognize the user image Iu to be viewed.

In contrast, in the case of a person who does not wear the security polarizing glasses 500, the user image and the disturbing images Iu and Ii are viewed together. Therefore, the readability of the user image Iu is degraded by the disturbed image Ii.

In the embodiment of the present invention, the pixel P constituted in the display panel 110 is composed of the main pixel P1 and the sub-pixel P2, and the main pixel P1 and the sub-pixel P2 ), Which will be described in more detail below.

Referring to FIG. 3, each pixel P may include a main pixel P1 and a sub-pixel P2. The main pixel and the sub-pixels P1 and P2 are connected to the same data line DL, for example, and can be connected to neighboring gate lines GL. The gate line GL connected to the main pixel is referred to as a first gate line GL1 and the gate line GL connected to the sub-pixel P2 is referred to as a second gate line GL2. .

Each of the main pixel and the subpixels P1 and P2 includes a switching transistor T connected to the data line and the corresponding gate line DL and GL and a liquid crystal capacitor and a storage capacitor Clc connected to the switching transistor T, Cst).

The main pixel P1 receives the first image data D1 through the data line DL and the sub pixel P2 receives the second image data D2 through the data line DL.

Referring to FIG. 4, a description will be given of the first and second video data D1 and D2 according to the driving mode. 4 is a diagram for explaining image data input to a main pixel and a sub-pixel according to a driving mode in a display device according to an embodiment of the present invention.

In FIG. 4, the first row line and the second row line are shown for convenience of explanation, and '1-1', '1-2', '2-1', and ' 2-2 ', the first numbers 1 and 2 are the line-line order, and the second numbers 1 and 2 indicate the main pixel and the sub-pixel.

In the normal mode, the same image data for displaying the planar image can be input to both the main pixel and the sub-pixel (P1, P2). That is, the input image data D may be used as the first image data D1 and the input image data D may be used as the second image data D2.

As another example, in the normal mode, the first image data D1 and the second image data D2 different from the first image data D1 may be input. In this regard, for example, interpolation data is generated by using an interpolation method in units of columns for the input image data D, the input image data D is output as the first image data D1, The second video data D2 can be outputted.

As described above, when the interpolation data is generated, the effect of doubling the resolution in the vertical direction can be exhibited.

On the other hand, in the 3D mode, the left eye or right eye image data corresponding to the corresponding row line can be input to the main pixel P1 as the first image data D1. In the subpixel P2, black data for making the subpixel P1 black can be input as the second image data D2.

As described above, when black data is input to the subpixel P2, the main pixels P1 neighboring along the vertical direction are spaced apart by the width of the subpixel P2. That is, the subpixels P2 function as a barrier for discriminating between adjacent pixels P as they are. This increases the angle at which the light incident on the neighboring pixel P can be seen from the outside. Accordingly, the display device according to the embodiment of the present invention exerts the effect of increasing the viewing angle in the stereoscopic image display.

In the security mode, the input image data D is input to the odd-numbered row line pixels P as the row-line pixels P for generating the user image Iu. In this regard, for example, odd-numbered row line data of the input image is output as first image data D1 and input to the main pixel P1, and even-numbered row line data of the input image is output as second image data D2 And inputs them to the sub-pixel P2.

In the security mode, the disturbance data is input to the even-numbered row-line pixels P as the row-line pixels P that generate the disturbed image Ii. That is, the disturbance data is input as the first and second image data D1 and D2 to the main pixel and the sub-pixels P1 and P2 of the even-numbered row line pixel P, respectively.

When the input image data D is input to the main pixel and the sub-pixels P1 and P2 which display the user image Iu in the security mode as described above, the user can see the entire input image. Therefore, unlike the conventional case where the resolution is reduced by half, the user can recognize the input original image without degrading the resolution.

5 and 6 are graphs showing simulation results in the security mode according to the conventional and the embodiments of the present invention, respectively.

Referring to FIG. 5, it can be seen that the resolution in the vertical direction in the conventional security mode is lowered, and it is somewhat difficult for the user to recognize the image.

On the other hand, referring to FIG. 6, resolution degradation does not occur in the vertical direction when the security mode is applied in the embodiment of the present invention, and it can be seen that the user can correctly recognize the image as compared with the conventional method.

As described above, according to the embodiment of the present invention, a pixel constitutes a main pixel and a sub-pixel. In this case, when the security mode is activated, the resolution of the original image can be maintained by inputting the original image data to the main pixel and the sub-pixel of the pixel of the row line that generates the original image.

Further, when the black data is input to the sub-pixel in the 3D mode driving, the effect of improving the viewing angle can be exhibited.

When the interpolation data is input to the sub-pixel in the 2D mode driving, the effect of increasing the resolution in the vertical direction can be exhibited.

The embodiment of the present invention described above is an example of the present invention, and variations are possible within the spirit of the present invention. Accordingly, the invention includes modifications of the invention within the scope of the appended claims and equivalents thereof.

P: pixel P1: main pixel
P2: Sub-pixel DL: Data line
GL1: first gate wiring GL2: second gate wiring
T: switching transistor Clc: liquid crystal capacitor
Cst: storage capacitor D1: first image data
D2: second image data

Claims (12)

A 3D mode using a polarizing glasses for 3D having a normal mode in which polarizing glasses are not used and a left eye lens for converting the first circular polarized light into linear polarized light and a right eye lens for converting the second circular polarized light into linear polarized light, A polarizing glasses type display device driven in a security mode using a security polarizing glasses having a left eye lens and a right eye lens for converting one-way circularly polarized light into linearly polarized light,
A display panel including pixels arranged in a matrix form along a row line and a column line, the pixel including a main pixel and a sub-pixel arranged along the row direction;
And a pattern drifter positioned on the display surface of the display panel and generating the first and second circularly polarized light alternately arranged in the row line unit,
When operating in the secure mode,
One of the odd-numbered and even-numbered row lines displays an input image, the other of the odd-numbered and even-numbered row lines displays an obstructive image inhibiting the reading of the input image,
One of the odd-numbered and even-numbered row line data of the input image is input to the main pixel and the sub-pixel of the row line displaying the input image, respectively
Polarized glasses type display device.
The method according to claim 1,
In the 3D mode driving,
One of the left eye image data and the right eye image data is input to the main pixel and the black data is input to the sub pixel
Polarized glasses type display device.
The method according to claim 1,
In the normal mode driving,
Data of the input image is input to the main pixel,
The same data as the main pixel or the interpolation data for the input image data is input to the sub-pixel
Polarized glasses type display device.
The method according to claim 1,
And a data processor for generating data to be input to the main pixel and the sub-pixel according to the normal mode, the 3D mode, and the security mode,
Polarized glasses type display device.
The method according to claim 1,
The main pixel and the sub-pixel are connected to the same data line and are connected to neighboring gate lines, respectively
Polarized glasses type display device.
A display panel arranged in a matrix form along a row line and a column line, the display panel including a pixel constituted by a main pixel and a subpixel along the row line direction; and a display panel located on the display surface of the display panel, And a pattern runner for generating first and second circularly polarized light opposite to each other, the normal mode not using polarized glasses, the left eye lens for converting the first circularly polarized light into linearly polarized light, A 3D mode using polarizing glasses for 3D having a right eye lens for converting polarized light into linearly polarized light and a security mode using security polarizing glasses each having a left eye lens and a right eye lens for converting the first circularly polarized light into linearly polarized light The method comprising the steps of:
When operating in the secure mode,
One of the odd-numbered and even-numbered row lines displays an input image, the other of the odd-numbered and even-numbered row lines displays an obstructive image inhibiting the reading of the input image,
One of the odd-numbered and even-numbered row line data of the input image is input to the main pixel and the sub-pixel of the row line displaying the input image, respectively
A method of driving a polarizing glasses type display device.
The method according to claim 6,
In the 3D mode driving,
One of the left eye image data and the right eye image data is input to the main pixel and the black data is input to the sub pixel
A method of driving a polarizing glasses type display device.
The method according to claim 6,
In the normal mode driving,
Data of the input image is input to the main pixel,
The same data as the main pixel or interpolation data on the data of the input image is input to the sub-pixel
A method of driving a polarizing glasses type display device.
The method according to claim 6,
Wherein the polarizing glasses system display apparatus includes a data processor for generating data to be input to the main pixel and the sub-pixel according to the normal mode, the 3D mode, and the security mode
A method of driving a polarizing glasses type display device.
The method according to claim 6,
The main pixel and the sub-pixel are connected to the same data line and are connected to neighboring gate lines, respectively
A method of driving a polarizing glasses type display device.
The method according to claim 1,
Wherein the row line of the display panel includes adjacent first and second row lines,
When operating in the secure mode,
The first row line data and the second row line data of the input image are input to the main pixel and the sub-pixel of the first row line, the first row line displays the input image,
Data of the disturbance image is input to the main pixel and the sub-pixel of the second row line, the second row line displays the disturbance image,
The input image displayed by the first row line is output to the first circularly polarized light through the pattern leader,
And the disturbance image displayed by the second row line is emitted as the second circularly polarized light through the pattern drifter
Polarized glasses type display device.
12. The method of claim 11,
When operating in the secure mode,
Wherein the input image passes through the left eye lens and the right eye lens of the security polarizing glasses to the user who wears the security polarizing glasses, and the disturbance image is transmitted to the user through the left eye lens and the right eye lens Is not transmitted to the user wearing the security polarized glasses,
The input image and the disturbance image are transmitted to a surrounding person who does not wear the security polarized glasses
Polarized glasses type display device.

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